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How this famous clock stays on time for New Year's Eve

London’s Big Ben is probably the world’s most famous clock and central to the UK’s New Year celebrations. But, in a digital world what does it take to keep the analogue 165-year mechanical clock on time? CNN's Isa Soares climbs the narrow stairs and goes behind the scenes of the iconic landmark to see what it takes to make sure London’s New Year happens when it should.

2:40 • Source: CNN
New Year's Eve 2025 11 videos
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How this famous clock stays on time for New Year's Eve
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This photograph taken on September 12, 2025 above Gletsch, in the Swiss Alps, shows two tourists facing the Rhone Glacier melting into its glacial lake. Switzerland's glaciers, which are disproportionately impacted by climate change, have shed a quarter of their mass in the past decade alone, a study warned amid concerns the melt is accelerating. In 2025, glacial melting in Switzerland was once again "enormous", the Glacier Monitoring in Switzerland (GLAMOS) network said, adding it was close to the record set in 2022.
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Do your vacation plans always leave you exhausted? Here’s how to fix that
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'You are not alone': Anderson Cooper gives heartfelt message about grief on New Year's Eve
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Sticking to your New Year's resolution
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See Andy and Anderson's best moments from New Year’s Eve
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Andy Cohen's parents confess they 'haven't been watching' New Year's Eve show
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Andy and Anderson take a shot with Stephen Colbert
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Anderson Cooper and Andy Cohen were given puppets of each other on New Year's Eve. Chaos ensues
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Anderson, Andy and celebs share their New Year's resolutions
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CNN rings in 2026 around the world
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Man fulfills 50-year bucket list item to be in Times Square for New Year's Eve
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